During at a panel at SMX West, Gary Illyes commented that, beginning back in May 2014, they may discontinue the AJAX crawlability recommendations offered in the Google Developer center. For those who don’t know, Google has offered proposals on how to make AJAX, asynchronous JavaScript and XML, crawlable for search engines. These services could very well end as soon as next week.
Gary said you may see a blog post at the Google Webmaster Blog as soon as next week announcing the decommissioning of these guidelines.
Will Google stop crawling AJAX completely, or will they slowly phase it out as they are able to get better at rendering and interpreting more complex forms of JavaScript? At this point, it is still unclear.